There is extensive documentation installed (/usr/share/doc/NVIDIA_GLX-1.0/README.txt) when you run the package, which is also on the same web page that you got the download from. It says:
Code:
'nvidia-installer' options
--uninstall
During installation, the installer will make backups of any conflicting
files and record the installation of new files. The uninstall option
undoes an install, restoring the system to its pre-install state.